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l3ipp
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pleias-post-ocr-aligned-paragraph-en

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source_index_id
int64
1.05k
1.07k
source_id
stringclasses
1 value
date
stringdate
1890-06-24 00:00:00
1890-06-27 00:00:00
edition
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1 value
page
stringclasses
6 values
file_name
stringclasses
9 values
word_count
int64
6.23k
10.9k
language
stringclasses
1 value
alignment_level
stringclasses
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chunk_id
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0
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ocr_text
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33
540
corrected_text
stringlengths
32
539
offsets
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20
28
source_ocr_text
stringclasses
9 values
source_corrected_text
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similarity
float32
0.65
0.96
char_length_ratio
float32
0.97
1
token_length_ratio
float32
0.73
1.09
digit_score
float32
0.57
1
1,050
sn99021999
1890-06-24
1
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sn99021999/1890/06/24/ed-1/seq-6/ocr.txt
7,482
en
paragraph
0
THHJ C M A 14 A1 HAM p 0 _ _ THE OMAHA DAILY BEE , TUEBPAY , JUNE 24 , 1890 , _ _ NEWS ABOUT THE BLUFFS Comparatively Little Damage Done b , Sunday Night's Storm , I , SOME EXCEED
THE OMAHA DAILY BEE, TUESDAY, JUNE 24, 1890 NEWS ABOUT THE BLUFFS Comparatively Little Damage Done by Sunday Night's Storm, SOME EXCEEDINGLY NARROW ESCAPES An Odyssean Memorial
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THHJ C M A 14 A1 HAM p 0 _ _ THE OMAHA DAILY BEE , TUEBPAY , JUNE 24 , 1890 , _ _ NEWS ABOUT THE BLUFFS Comparatively Little Damage Done b , Sunday Night's Storm , I , SOME EXCEEDINGLY NARROW ESCAPES An OdiirolloxvH * . Memorial CoiniiionccniKiit I'ro rniiunc nt Ht. AuniliMtiy An Un- fondcd Htiinof NotcH. The rcsnlU of...
THE OMAHA DAILY BEE, TUESDAY, JUNE 24, 1890 NEWS ABOUT THE BLUFFS Comparatively Little Damage Done by Sunday Night's Storm, SOME EXCEEDINGLY NARROW ESCAPES An Odyssean Memorial Communication Department at H.E. An Unfounded Storm Notice. The result of Sunday night's storm was apparent on every hand yesterday morning,...
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sn99021999
1890-06-25
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sn99021999/1890/06/25/ed-1/seq-1/ocr.txt
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paragraph
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rl help at the Muuson Louse. It was beyond question of Incendiary origin , the whole side of the building being saturated with coal oil. The flro which caused the destruction of the city originated In the rear of the I. X. Li. paint store , and in spite of every effort spread until It had wiped out blxtccn of the leadi...
It was beyond question of Incendiary origin, the whole side of the building being saturated with coal oil. The fire which caused the destruction of the city originated in the rear of the I. X. L. paint store, and in spite of every effort spread until it had wiped out between of the leading business houses of the place ...
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THE OMAHA ! DAILY BEE. TWENTIETH YEAR. OMAHA. WEDNESDAY JMjgNING. ( ! JUNE 25. 1890. NUMBER 7. LICKED UP BY THE FLAMES , An Incendiary Wreaks His Vengeance o Blue Hill , Nebraska. NEARLY TWENTY STORES BLOTTED OUT , Tlio Amount of lnmnc Done Iloimlily Kutlmnted .nt Over Fifty Thousand DollurH , With Comparatively Little...
THE OMAHA DAILY BEE. TWENTIETH YEAR. OMAHA, WEDNESDAY MORNING. JUNE 25, 1890. NUMBER 7. LICKED UP BY THE FLAMES, An Incendiary Wreaks His Vengeance on Blue Hill, Nebraska. NEARLY TWENTY STORES BLOTTED OUT, The Amount of Damage Done Is Estimated at Over Fifty Thousand Dollars, With Comparatively Little Insurance. BLUE H...
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sn99021999
1890-06-25
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sn99021999/1890/06/25/ed-1/seq-3/ocr.txt
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paragraph
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"tHE SPECULATIVE MARKETS , TOeat Figures Rally for a Little While , but Pall Back. THE CORN MARKET W(...TRUNCATED)
"THE SPECULATIVE MARKETS, TOilet Figures Rally for a Little While, but Fall Back. THE CORN MARKET WA(...TRUNCATED)
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"tHE SPECULATIVE MARKETS ,\nTOeat Figures Rally for a Little While ,\nbut Pall Back.\nTHE CORN MARKE(...TRUNCATED)
"THE SPECULATIVE MARKETS,\nTOilet Figures Rally for a Little While,\nbut Fall Back.\nTHE CORN MARKET(...TRUNCATED)
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1890-06-26
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sn99021999/1890/06/26/ed-1/seq-1/ocr.txt
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paragraph
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"THE OMAHA i DAILY TWENTIETH YEAR OMAHA. THURSDAY STG , JUNE 20 , 1890. NUMBER THEY ADOPTED A NEW CR(...TRUNCATED)
"THE OMAHA DAILY TWENTIETH YEAR OMAHA, THURSDAY, JUNE 20, 1890. NUMBER THEY ADOPTED A NEW CREED, Pro(...TRUNCATED)
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"THE OMAHA i DAILY\nTWENTIETH YEAR OMAHA. THURSDAY STG , JUNE 20 , 1890. NUMBER\nTHEY ADOPTED A NEW (...TRUNCATED)
"THE OMAHA DAILY\nTWENTIETH YEAR OMAHA, THURSDAY, JUNE 20, 1890. NUMBER\nTHEY ADOPTED A NEW CREED,\n(...TRUNCATED)
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sn99021999
1890-06-26
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sn99021999/1890/06/26/ed-1/seq-1/ocr.txt
9,869
en
paragraph
1
ATIVES : Hie "Bottled Policy" Blunder
The "Bottled Policy" Blunder of Last
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"THE OMAHA i DAILY\nTWENTIETH YEAR OMAHA. THURSDAY STG , JUNE 20 , 1890. NUMBER\nTHEY ADOPTED A NEW (...TRUNCATED)
"THE OMAHA DAILY\nTWENTIETH YEAR OMAHA, THURSDAY, JUNE 20, 1890. NUMBER\nTHEY ADOPTED A NEW CREED,\n(...TRUNCATED)
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sn99021999
1890-06-26
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sn99021999/1890/06/26/ed-1/seq-4/ocr.txt
9,065
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paragraph
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"b , of which ho is , member it o , > composed en tirely of republican stalwarts. And precious stalw(...TRUNCATED)
"John testified that the Tammany Twenty-eight Club, of which he is a member, is composed entirely of(...TRUNCATED)
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"knul A If * i\"l > * T f vrwitum' r tmf-r-t -\nTHIIMH oi *\n/i/illy / and Sunday , Ono Your . tin m(...TRUNCATED)
"This is the corrected text, based on the context clues provided by the original text:\n\"Throughout(...TRUNCATED)
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sn99021999
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sn99021999/1890/06/26/ed-1/seq-4/ocr.txt
9,065
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paragraph
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"sh syndicate will not seriously af fect the local supply of entertaining curiosities. As long as th(...TRUNCATED)
"The purchase of the museums by the English syndicate will not seriously affect the local supply of (...TRUNCATED)
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"knul A If * i\"l > * T f vrwitum' r tmf-r-t -\nTHIIMH oi *\n/i/illy / and Sunday , Ono Your . tin m(...TRUNCATED)
"This is the corrected text, based on the context clues provided by the original text:\n\"Throughout(...TRUNCATED)
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9,065
en
paragraph
9
"urers are alarmed. The prospective loss of the in creased tariff smuggled into the McKln- ley bill (...TRUNCATED)
"The plate glass manufacturers are alarmed. The prospective loss of the increased tariff smuggled in(...TRUNCATED)
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"knul A If * i\"l > * T f vrwitum' r tmf-r-t -\nTHIIMH oi *\n/i/illy / and Sunday , Ono Your . tin m(...TRUNCATED)
"This is the corrected text, based on the context clues provided by the original text:\n\"Throughout(...TRUNCATED)
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1890-06-26
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sn99021999/1890/06/26/ed-1/seq-4/ocr.txt
9,065
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paragraph
10
uminous blood spots on the Mexican moon , and a revo lution imponds. It Is a dull , dr
There are several luminous blood spots on the Mexican moon, and a revolution impends.
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"knul A If * i\"l > * T f vrwitum' r tmf-r-t -\nTHIIMH oi *\n/i/illy / and Sunday , Ono Your . tin m(...TRUNCATED)
"This is the corrected text, based on the context clues provided by the original text:\n\"Throughout(...TRUNCATED)
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sn99021999
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paragraph
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"eary season that does not develop a crop of domestic disturbance in the land of the greaser. They a(...TRUNCATED)
"It is a dull, dreary season that does not develop a crop of domestic disturbance in the land of the(...TRUNCATED)
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"knul A If * i\"l > * T f vrwitum' r tmf-r-t -\nTHIIMH oi *\n/i/illy / and Sunday , Ono Your . tin m(...TRUNCATED)
"This is the corrected text, based on the context clues provided by the original text:\n\"Throughout(...TRUNCATED)
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PleIAs Post-OCR Aligned Paragraph

Dataset description

This dataset is a cleaned and re-aligned paragraph-level version of PleIAs/Post-OCR-Correction, prepared for post-OCR correction training.

The original dataset contains pairs of noisy OCR text and corrected text. However, some pairs include hallucinations, omissions, or weak alignment between source and target. This derived version restructures the data into paragraph-level aligned examples using an alignment pipeline, with optional pruning to remove poorly matched content.

The goal is to provide training examples that are more faithful to the original OCR input and therefore more suitable for supervised post-OCR correction.

Source dataset

This dataset was derived from:

  • PleIAs/Post-OCR-Correction

What was changed

The original page-level OCR/corrected pairs were:

  • segmented and aligned at the paragraph level
  • pruned during alignment to remove non-matching content
  • converted into smaller training-ready pairs

This version was generated with:

  • language: english
  • alignment level: paragraph
  • pruning: True

Data fields

Each row contains:

  • source_index_id: original row index from the source dataset
  • source_id: original document identifier
  • date: source date
  • edition: source edition
  • page: source page
  • file_name: source file path
  • word_count: original word count
  • language: language of the example
  • alignment_level: alignment level used to create the example
  • chunk_id: paragraph chunk identifier within the source example
  • ocr_text: aligned noisy OCR text
  • corrected_text: aligned corrected text
  • offsets: alignment offsets when available
  • source_ocr_text: full original OCR text
  • source_corrected_text: full original corrected text

Limitations

Although this version is cleaner than the source dataset, it may still contain:

  • residual alignment errors
  • partial hallucinations
  • truncated or imperfect paragraph boundaries
  • normalization inconsistencies inherited from the source data

It should be treated as a training resource that may still benefit from additional filtering.

Creation procedure

The dataset was created by:

  1. loading examples from PleIAs/Post-OCR-Correction
  2. aligning OCR text and corrected text with a custom alignment pipeline
  3. pruning non-matching spans
  4. extracting aligned paragraph-level pairs
  5. saving the resulting aligned examples as a new Hugging Face dataset

License

The source collection is created from PleIAs/Post-OCR-Correction that is described as being in the public domain everywhere, meaning the patrimonial rights of the original rightsholders have expired.

This dataset therefore inherits a public domain status for the source textual material.
Please still verify the status of any added metadata, curation, or derived processing for your specific downstream use.

Citation

If you use this dataset, please cite the original source dataset and this aligned derivative version.

Original dataset

PleIAs/Post-OCR-Correction

Derived dataset

l3ipp/pleias-post-ocr-aligned-paragraph and emanuelaboros/pleias-post-ocr-aligned-paragraph
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